Abstract: A mounting device for mounting a flashlight on a handgun has a first bracket for attachment to the grip of the handgun, the bracket being contoured to the surface of the handgun grip and engageable with the grip by friction. The bracket which engages the grip, extends partially around the grip, and is further urged against the grip by means of an elastic band. The first bracket is connected to a second bracket which holds a flashlight in desired alignment for coinciding with the barrel of the gun. The second bracket is located away from the grasping surface except for an upper region that is welded flush to the first bracket so as to not interfere with normal gripping of the gun. This attachment system avoids problems associated with fitting of prior attachments into holsters for handguns and provides a simple, readily attached and removed lighting device.